Musical drum.



BEST AVNL'ABLE 00% 0. & E. MEINEL. MUSICAL DRUM. APPLIQATION FILED MAR. so. 1903.

PATENTED SEPT. 20, 1904.

N0 MODEL.

BEST AVAILABLE COP:

UNITED STATES Patented September 2t 1904.

OTTOMAR MEINEL AND ERNST MEIN EL, OF GOHLIS, NEAR LEIPIG,

GERMANY.

musloAL' DRUM.

SPECIFICATION forming part of Letters Patent No. 770,300, dated September 20, 1904.

Application filed March 30,1903- To all whom, it may concern.-

Be it known that we, OTTOMAR MEINEL and ERNs'r MEINEL, both subjects of the King of Saxony, both residing at No. 15 St. 'Privat street, Gohlis, near Leipzig, in the Kingdom of Saxony, German Empire, have invented the hammers on the note-disk; third, to provide means for driving the note-disk, and, fourth, to so arrange the whole that the revoluble note-disk can be replaced by another one. We attain these objects by the mechanism illustrated in a mode of execution in the accompanying drawings, in which- Figure l is a plan of the musical drum, the cover being removed; and Fig. 2 is a vertical section through the same on the broken line M M in Fig. 1.

Similar letters of reference refer to similar parts in both views.

Within the casing a at a certain distance from its center a board 0 is secured, which carries a pin d for the revoluble note-disk e, an arm 6, a combined bearing and support f, a bearing f, and a support 0. The revoluble diske rests on the support f and two guiding-rollers q q, of which the one q turns on a pin secured to the drum-casing a and the other roller 9 on a pin held by the arm 27. The note-disk 0 has three concen trical series of rectangular perforations m m and along the periphery as'eries of notches p. In the two bearings f f a shaft g is secured, on which three two-armed levers 'ua are mounted to turn in-' dependently of each other. They may be prevented from shifting on the shaft by collars or the like. The one arm of each lever u is provided with a nose 1', which can engage the several perforations mm of the respective con- Serial Nol50,306. (No modal.)

centric series. The other arm is rigidly connectediwith the elastic helve it of the hammer k. The note-disk ecan be revolved by a handle n on the outside of the drum-casinga by means of a shaft w and a gear-wheel 0, the teeth of which engage in the notches p. The shaft w is mounted to turn in the support 11 and a suitable bearing in the drum-easing a.

It will be evident that the weight of each hammer is will cause the respective nose z'to bear from below against the under side of the note-disk e. For taking up this pressure of the noses 71 a horizontal shaft r, carrying three sharply-edged guiding-disks mm, is mounted.

to turn in an extension of the support f and in a bearing y, which is secured on the upper end of the pin (Z. The guiding-disksowbea: on the upper side of the note-disk e and prevent the latter from rising. When the notedisk e is revolved by the handle a, each nose' 6 will engage in the several perforationsmof the respective series and allow the, hammer k to drop and strike against the bottom orskin b, when the latter will sound. So as to increase the strength of the blow, springs Z are preferably fastened on the board 0, which bear against the nosed arms of the levers u u. During the revolution of the note-disk 0 each nose 2', owing to its tapering shape, will be again forced downward out of the perforation m and raise the hammer is. Fig. 2 represents two hammers 7c is in the uppefand lower positions, respectively. The various perforations on. of the note-disk e are of course so arranged that the note-disk e requiresto be replaced by another one after the dover or skin 8 and also the shaft r have been -emoved.

lVhere it is so preferred, the board 0 may be secured without the drum either on its casing a or in a suitable frame.

In case the musical drum is portable it is evident that the mechanism within the same may be left alone, and the common sticks can be used for sounding the drum. i

Having now described our invention, what we wish to secure by Letters Patent of the therein, bearings mounted on said board BEST AVAILABLE com support a shaft, a series of hammers mounted on saidQshaft and having tailpieces extending to the rear of the same with upwardly-turned noses, the heads of said hammers being adapted to contact with the interior of the lower drum-skin, anote-disk having orifices, mounted above said hammer-tailpieces and adapted to rest on the top of one of the said bearings, supporting-rolls suitably mounted within the drum to support the said disk at other points and a pressure-arm to rest thereon,and springs adapted to force the hammer-heads against the drum-skin, when the nose of said hammer is revolved from the exterior of the drum substantially as described.

In witness whereof we have hereunto set our hands in presence of two witnesses.

OTTOMAR MEINEL. ERNST MEINEL.

Witnesses:

MORITZ SPREER, R. P. C. DUNN. 

